518 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Johnsburg: Black Diamond Plumbing & Mechanical Inc., CR Score 65/100; 4.9★ from 6,580 Google reviews; open 24/7.
Best for emergencies (open 24/7): Duane Blanton Plumbing, Sewer, Heating & Cooling, posts 24/7 hours; ranked #2 of 518.
Most-reviewed: ABC Plumbing, Sewer, Heating, Cooling & Electric, 22,524 Google reviews at 4.7★, the most of 518 ranked; ranked #9.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
518 Johnsburg HVAC contractors are ranked here by CR Score, from ten published factors. 235 are open 24/7, 387 open Saturdays and 314 open Sundays, based on posted hours. The median Google rating is 4.9★ across 518 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Black Diamond Plumbing & Mechanical Inc. | 65 | 4.9★ (6,580) | McHenry, 6 mi away | 24/7 | Overall |
| 2 | Duane Blanton Plumbing, Sewer, Heating & Cooling | 62 | 4.7★ (2,290) | Round Lake, 8 mi away | 24/7 | Emergencies |
| 3 | McHenry Heating & Air, Inc. | 62 | 4.9★ (596) | McHenry, 6 mi away | 24/7 | — |
| 4 | Premier Comfort Heating & Cooling LLC | 62 | 4.9★ (371) | Fox Lake, 3 mi away | 24/7 | — |
| 5 | Command Service Center, INC | 62 | 5.0★ (745) | Antioch, 10 mi away | 24/7 | — |
| 6 | Comfort Doctors heating and Cooling Inc | 62 | 4.9★ (158) | Johnsburg | 24/7 | — |
| 7 | Woodstock Heating, Cooling & Electrical | 62 | 4.9★ (1,222) | Woodstock, 11 mi away | 24/7 | — |
| 8 | Comfort Cavalry Heating & Air | 62 | 4.9★ (1,086) | Antioch, 11 mi away | 24/7 | — |
| 9 | ABC Plumbing, Sewer, Heating, Cooling & Electric | 62 | 4.7★ (22,524) | Arlington Heights, 21 mi away | 24/7 | Most reviews |
| 10 | 24HR Home Comfort Services | 61 | 4.9★ (1,374) | Lake in the Hills, 13 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and trade focus: 4.9★ from 6,580 Google reviews, listed on Google as “HVAC contractor”.
Based in Round Lake, 8 mi away
Ranked #2 because of its Google rating and trade focus: 4.7★ from 2,290 Google reviews, listed on Google as “HVAC contractor”.
Based in McHenry, 6 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 596 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Fox Lake, 3 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 371 Google reviews, listed on Google as “HVAC contractor”.
Based in Antioch, 10 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 745 Google reviews, listed on Google as “HVAC contractor”.
Based in Johnsburg
Ranked #6 because of its Google rating and trade focus: 4.9★ from 158 Google reviews, listed on Google as “Heating contractor”.
Based in Woodstock, 11 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 1,222 Google reviews, listed on Google as “HVAC contractor”.
Based in Antioch, 11 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 1,086 Google reviews, listed on Google as “HVAC contractor”.
Based in Arlington Heights, 21 mi away
Ranked #9 because of its Google rating and review volume: 4.7★ from 22,524 Google reviews, the most in Johnsburg.
Based in Lake in the Hills, 13 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 1,374 Google reviews, listed on Google as “HVAC contractor”.
Based in Woodstock, 12 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 747 Google reviews, listed on Google as “HVAC contractor”.
Based in Grayslake, 11 mi away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 986 Google reviews, listed on Google as “HVAC contractor”.
Based in Crystal Lake, 9 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 472 Google reviews, listed on Google as “HVAC contractor”.
Based in Elgin, 20 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 3,222 Google reviews, listed on Google as “HVAC contractor”.
Based in Crystal Lake, 10 mi away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 744 Google reviews, listed on Google as “Furnace repair service”.
Based in Crystal Lake, 12 mi away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 1,043 Google reviews, listed on Google as “HVAC contractor”.
Based in Antioch, 9 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 235 Google reviews, listed on Google as “HVAC contractor”.
Based in Crystal Lake, 12 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 571 Google reviews, listed on Google as “HVAC contractor”.
Based in Island Lake, 8 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 931 Google reviews, listed on Google as “HVAC contractor”.
Based in Wauconda, 9 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 420 Google reviews, listed on Google as “HVAC contractor”.
Based in Libertyville, 16 mi away
Ranked #21 because of its Google rating and trade focus: 4.8★ from 2,018 Google reviews, listed on Google as “HVAC contractor”.
Based in Lake Bluff, 19 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 1,064 Google reviews, listed on Google as “HVAC contractor”.
Based in Antioch, 11 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 374 Google reviews, listed on Google as “HVAC contractor”.
Based in McHenry, 5 mi away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 175 Google reviews, listed on Google as “Heating contractor”.
Based in Fox Lake, 6 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 104 Google reviews, listed on Google as “HVAC contractor”.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 518 ranked HVAC contractors here; the rest are on their profiles.
20 more HVAC contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| A & J General | 5.0★ (2) | 14 mi |
| A Hartlett & Son | 4.5★ (2) | 11 mi |
| Air Management Services Inc | 4.0★ (2) | 19 mi |
| Aire Serv of Palatine | 4.9★ (766) | 20 mi |
| Alex’s Duct Cleaning | 5.0★ (269) | 10 mi |
| Anthonys Heating & Air | 3.0★ (2) | 8 mi |
| Bill's Heating and Cooling Service | 5.0★ (2) | 9 mi |
| Conservative Heating & Air Conditioning | 3.0★ (2) | 17 mi |
| Eagle Refrigeration Service | 4.5★ (2) | 4 mi |
| Four Seasons Heating, Air Conditioning, Plumbing, Electric | 4.7★ (2,787) | 20 mi |
| G&G vargas | 5.0★ (2) | 9 mi |
| GO GREEN Heating & Cooling | 5.0★ (2) | 18 mi |
| Magic HVAC Inc | 5.0★ (2) | 11 mi |
| Mannina Creations | 5.0★ (2) | 11 mi |
| Nick's Action Air | 5.0★ (2) | 16 mi |
| Ray's Heating & Cooling | 3.0★ (2) | 20 mi |
| Thermal Mechanical Inc. | 3.0★ (2) | 13 mi |
| TM HVAC contractor | 5.0★ (2) | 15 mi |
| Vita HVAC Services | 5.0★ (2) | 11 mi |
| Weatherwise Heating & Air Conditioning | 5.0★ (2) | 19 mi |
National price ranges in USD, not adjusted for Johnsburg. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| AC replacement | $3,887 | $5,978 | $8,073 | Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
| Furnace replacement | $2,823 | $4,814 | $6,896 | Per system, installed; typical range of customer-reported jobs. US national range | October 2026 |
In Illinois, furnace and heat pump calls peak in the coldest winter weeks and AC calls in summer heat waves. Spring and fall are the easiest times to book maintenance or a replacement.
We scored 518 Johnsburg HVAC contractors on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Johnsburg data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |